max10 adc sample point

hi everyone:

i try to use max10 on chip adc to sample a image sensor output. the frequence is 1MHz.

i need to know when the max10 on chip adc switch from sample to the hold mode. in most adc, this is controlled by the CONVST signal.

acctually i can test the sample point by

1.applying a 1MHz sin signal to the adc input,

2.set the adc sample frequence to 1MHz, the adc will generate a valid signal every 1μs

3.put the sin signal and the adc valid signal on the oscilloscope

4.figure out the relationship between valid signal and the sample point.

the problem is :

1. i can not get the precise result

2. i can not make sure every max10 has the same result

but i still want to find the relationship between valid signal and the sample point on manual.